package com.tanhua.server.service;

import cn.hutool.core.collection.CollUtil;
import cn.hutool.core.util.PageUtil;
import com.alibaba.cloud.commons.lang.StringUtils;
import com.github.tobato.fastdfs.domain.conn.FdfsWebServer;
import com.github.tobato.fastdfs.domain.fdfs.StorePath;
import com.github.tobato.fastdfs.service.FastFileStorageClient;
import com.tanhua.autoconfig.template.OssTemplate;
import com.tanhua.dubbo.api.CommentApi;
import com.tanhua.dubbo.api.UserInfoApi;
import com.tanhua.dubbo.api.VideoApi;
import com.tanhua.model.ErrorResult;
import com.tanhua.model.PageResult;
import com.tanhua.model.UserInfo;
import com.tanhua.model.enums.CommentType;
import com.tanhua.model.mongo.Comment;
import com.tanhua.model.mongo.Video;
import com.tanhua.model.vo.CommentVo;
import com.tanhua.model.vo.VideoVo;
import com.tanhua.server.interceptor.BusinessException;
import com.tanhua.server.interceptor.UserHolder;
import com.tanhua.utils.Constants;
import org.apache.dubbo.config.annotation.DubboReference;
import org.bson.types.ObjectId;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cache.annotation.CacheEvict;
import org.springframework.cache.annotation.Cacheable;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
public class SmallVideosService {

    @Autowired
    private OssTemplate ossTemplate;

    @Autowired
    private FastFileStorageClient fastFileStorageClient;

    @Autowired
    private FdfsWebServer webServer;

    @DubboReference
    private VideoApi videoApi;

    @DubboReference
    private UserInfoApi userInfoApi;

    @Autowired
    private StringRedisTemplate redisTemplate;

    @DubboReference
    private CommentApi commentApi;




    /**
     * 发布小视频
     */
    @CacheEvict(value="videos",allEntries = true)  //清空缓存
    public void saveVideos(MultipartFile videoThumbnail, MultipartFile videoFile) throws IOException {
            if(videoFile.isEmpty() || videoThumbnail.isEmpty()) {
            throw new BusinessException(ErrorResult.error());
        }
        //1、将视频上传到FastDFS,获取访问URL
        String filename = videoFile.getOriginalFilename();  // abc.mp4
        filename = filename.substring(filename.lastIndexOf(".")+1);
        StorePath storePath = fastFileStorageClient.uploadFile(videoFile.getInputStream(), videoFile.getSize(), filename, null);
        String videoUrl = webServer.getWebServerUrl() + storePath.getFullPath();
        //2、将封面图片上传到阿里云OSS，获取访问的URL
        String imageUrl = ossTemplate.upload(videoThumbnail.getOriginalFilename(), videoThumbnail.getInputStream());
        //3、构建Videos对象
        Video video = new Video();
        video.setUserId(UserHolder.getUserId());
        video.setPicUrl(imageUrl);
        video.setVideoUrl(videoUrl);
        video.setText("我就是我，不一样的烟火");
        //4、调用API保存数据
        String videoId = videoApi.save(video);
        if(StringUtils.isEmpty(videoId)) {
            throw new BusinessException(ErrorResult.error());
        }
	}
    //查询视频列表
    @Cacheable(
            value="videos",
            key = "T(com.tanhua.server.interceptor.UserHolder).getUserId()+'_'+#page+'_'+#pagesize")
    public PageResult queryVideoList(Integer page, Integer pagesize) {

        //1、查询redis数据
        String redisKey = Constants.VIDEOS_RECOMMEND +UserHolder.getUserId();
        String redisValue = redisTemplate.opsForValue().get(redisKey);
        //2、判断redis数据是否存在，判断redis中数据是否满足本次分页条数
        List<Video> list = new ArrayList<>();
        int redisPages = 0;
        if(!StringUtils.isEmpty(redisValue)) {
            //3、如果redis数据存在，根据VID查询数据
            String[] values = redisValue.split(",");
            //判断当前页的起始条数是否小于数组总数
            if( (page -1) * pagesize < values.length) {
                List<Long> vids = Arrays.stream(values).skip((page - 1) * pagesize).limit(pagesize)
                        .map(e->Long.valueOf(e))
                        .collect(Collectors.toList());
                //5、调用API根据PID数组查询动态数据
                list = videoApi.findMovementsByVids(vids);
            }
            redisPages = PageUtil.totalPage(values.length,pagesize);
        }
        //4、如果redis数据不存在，分页查询视频数据
        if(list.isEmpty()) {
            //page的计算规则，  传入的页码  -- redis查询的总页数
            list = videoApi.queryVideoList(page - redisPages, pagesize);  //page=1 ?
        }
        //5、提取视频列表中所有的用户id
        List<Long> userIds = CollUtil.getFieldValues(list, "userId", Long.class);
        //6、查询用户信息
        Map<Long, UserInfo> map = userInfoApi.findByIds(userIds, null);
        //7、构建返回值
        List<VideoVo> vos = new ArrayList<>();
        for (Video video : list) {
            UserInfo info = map.get(video.getUserId());
            if(info != null) {
                VideoVo vo = VideoVo.init(info, video);
                vos.add(vo);
            }
        }
        String key = Constants.VISITORS_USER;
        String hashKey = String.valueOf(UserHolder.getUserId());
        //redisTemplate.opsForHash().put(key,hashKey,System.currentTimeMillis()+"");
        return new PageResult(page,pagesize,0l,vos);
    }

    //视频点赞
    public void likeVideoId(Long userId, String videoId) {
        boolean exites = videoApi.judge(userId,videoId);
        if (exites){
            throw new RuntimeException("视频已点赞");
        }

        videoApi.saveLike(userId,videoId);
        //4、拼接redis的key，将用户的点赞状态存入redis
        String key = Constants.VIDEO_INTERACT_KEY + videoId;
        String hashKey = Constants.VIDEO_LIKE_HASHKEY + userId;
        redisTemplate.opsForHash().put(key,hashKey,"2");
    }
    //视频取消点赞
    public void disLikeVideoId(Long userId, String videoId) {
        boolean exites = videoApi.judge(userId,videoId);
        if (!exites){
            throw new RuntimeException("视频未点赞");
        }
        videoApi.deleteLike(userId,videoId);
        String key = Constants.VIDEO_INTERACT_KEY + videoId;
        String hashKey = Constants.VIDEO_LIKE_HASHKEY + userId;
        redisTemplate.opsForHash().delete(key,hashKey,"2");
    }

    //视频用户关注
    public void loveVideoId(Long userId, String videoId) {
        boolean exists = videoApi.judgeLove(userId, videoId);
        if (exists){
            throw new RuntimeException("用户已关注");
        }
        videoApi.saveLove(userId,videoId);
        //4、拼接redis的key，将用户的点赞状态存入redis
        String key = "shipinguanzhu" + videoId;
        String hashKey = "shipinguanzhu" + userId;
        redisTemplate.opsForHash().put(key,hashKey,"3");
    }

    //视频用户取消关注
    public void unloveVideoId(Long userId, String videoId) {
        boolean exists = videoApi.judgeLove(userId, videoId);
        if (!exists){
            throw new RuntimeException("用户未关注");
        }
        videoApi.deleteLove(userId,videoId);
        //4、拼接redis的key，将用户的点赞状态存入redis
        String key = "shipinguanzhu" + videoId;
        String hashKey = "shipinguanzhu" + userId;
        redisTemplate.opsForHash().delete(key,hashKey,"3");
    }

    //视频发布评论
    public void saveComments(ObjectId videoId, String comment) {
        //1、获取操作用户id
        Long userId = UserHolder.getUserId();
        //2、构造Comment
        Comment comment1 = new Comment();
        comment1.setPublishId(videoId);
        comment1.setCommentType(CommentType.COMMENT.getType());
        comment1.setContent(comment);
        comment1.setUserId(userId);
        comment1.setCreated(System.currentTimeMillis());
        //3、调用API保存评论
        videoApi.saveComment(comment1);
    }

    //视频评论点赞
    public void commentsLike(ObjectId videoId, Long userId) {
        boolean exists = videoApi.judgeComments(videoId,userId);
        if (exists){
            throw new RuntimeException("视频评论已点赞");
        }
        videoApi.saveLikeComment(videoId,userId);
        String key = "shipingpinglundianzan"+ videoId;
        String hashKey = "shipingpinglundianzan"+ userId;
        redisTemplate.opsForHash().put(key,hashKey,"2");
    }

    //视频评论取消点赞
    public void commentsdisLike(ObjectId videoId, Long userId) {
        boolean exists = videoApi.judgeComments(videoId,userId);
        if (!exists){
            throw new RuntimeException("视频评论未点赞");
        }
        videoApi.deleteLikeComment(videoId,userId);
    }

    //视频评论列表
    public PageResult queryComments(Integer page, Integer pagesize) {
        //page的计算规则
        List<Comment> list = videoApi.queryCommentList(page, pagesize);
        //5、提取视频列表中所有的用户id
        List<Long> userIds = CollUtil.getFieldValues(list, "userId", Long.class);
        //6、查询用户信息
        Map<Long, UserInfo> map = userInfoApi.findByIds(userIds, null);
        //7、构建返回值
        List<CommentVo> cos = new ArrayList<>();
        for (Comment comment : list) {
            UserInfo info = map.get(comment.getUserId());
            if(info != null) {
                CommentVo co = CommentVo.init(info, comment);
                cos.add(co);
            }
        }
        return new PageResult(page,pagesize,0l,cos);
    }
}